Electric dirt bikes can deliver plenty of power, but long charging stops remain a difficult problem for endurance riding. The Radian EXR takes a more direct approach: when its battery runs low, the rider can pull out the modules and replace them in less than 30 seconds.
Developed in the Netherlands, the EXR is a purpose-built electric enduro motorcycle scheduled to become available from late 2027. It combines a 70-hp drivetrain with removable batteries, adjustable KYB suspension, Brembo brakes and equipment intended to make it street legal.
Its most important component, however, is the unusual curved battery inside the frame.
Two battery modules designed for rapid swaps
Radian calls the system InfiniPack. Rather than using one large block that would be difficult for a single rider to lift, the 8.6-kWh Endurance battery is divided into two 4.3-kWh modules.
Each module weighs 22 kg (48.5 lb), bringing their combined weight to 44 kg (97 lb). The curved shape is intended to make them easier to pull upward and out of the motorcycle after the seat is released. Radian says one person can complete the entire tool-free swap in under 30 seconds.
The production bike is expected to come with the Endurance 8.6 pack. Radian quotes an off-road range of approximately 60 km (37 miles) at professional race pace or as much as 115 km (71 miles) in recreational use. Real-world range will therefore depend heavily on terrain, speed and riding style.
The company lists an IP67-equivalent protection rating for the battery. Thermally connected aluminum side plates help carry heat away from the cells.
The batteries can charge outside the bike
Owners will not need to leave the motorcycle parked while its batteries charge. Radian’s wheeled InfiniDock holds two modules and connects to the standard 3.3-kW charger, allowing one set to charge while another is being used.
Radian lists a 20–80% charging time of 90 minutes. The dock itself weighs 8 kg (17.6 lb) and includes wheels, a carrying handle and a collapsible design for transport.
A smaller 5.8-kWh Sprint battery is shown as a future option, but Radian says it is not yet available. The same applies to planned onboard and CCS-compatible charging modules, so those should not be treated as launch equipment.
70 horsepower and unusually large rear-wheel torque
The EXR uses a liquid-cooled internal permanent-magnet motor with a carbon-sleeved rotor. Its electrical system operates at 288 volts nominal and 336 volts maximum, while motor speed can reach 14,000 rpm.
Peak output is listed at 52 kW, or 70 hp. Radian also quotes 1,060 Nm (782 lb-ft) at the rear wheel. That torque figure includes the multiplication produced by the final drive, so it should not be directly compared with crankshaft or motor-shaft torque figures from conventional motorcycles.
Radian says the battery’s arc places the motorcycle’s center of gravity inside the pack’s curved profile. The motor is mounted low in the aluminum twin-spar frame and functions as part of the structure. The frame also acts as a heat sink for the drivetrain.
With the Endurance battery installed, the EXR has a target weight of 125 kg (276 lb). Because the motorcycle is still in development, figures described as targets may change before production.
Enduro hardware and app-adjustable power
The chassis uses a 21-inch front wheel and an 18-inch rear wheel. Adjustable KYB forks and a KYB rear shock were developed with suspension specialist Technical Touch. Compression and rebound can be adjusted at the front, while the rear adds high- and low-speed compression adjustment and preload.
Braking hardware comes from Brembo. In place of a conventional rear brake pedal, the rear brake is operated through a left-hand lever. The bike also has a push-button reverse mode, an integrated skid plate, front and rear LED lighting and lifting handles molded into the rear section.
An Android and iOS companion app will allow riders to select predefined power curves or create custom profiles. A small handlebar display provides essential riding information and includes enduro-oriented features such as digital timekeeping.
There is also a 7-liter (0.25-cu-ft) storage compartment in the subframe for tools, food, spare parts or interchangeable modules. Radian plans to publish 3D design files so owners can create their own inserts.
Price and availability
Radian says EXR production is planned to begin in the fourth quarter of 2027. Its first release region covers the Netherlands, Belgium and Germany, followed by other European markets.
The individually numbered Founders Edition was advertised from €14,450, but its 50-bike allocation is now listed as sold out. At the time of writing, the Standard Edition carries a limited launch price of €14,750. A €99 voucher reserves a place in line and is intended to be deducted from the eventual purchase price.
Radian’s ordering page currently shows estimated delivery in 2028 for some European configurations, while customers outside Europe can only join an interest list. Prices, specifications and delivery dates remain subject to change before production.
The EXR is therefore not a motorcycle buyers can take home today. But its replaceable battery tackles one of electric enduro’s most obvious limitations in a practical way: instead of asking riders to shorten the event around the battery, Radian wants the battery stop to take less time than refueling.
Product page: Radian EXR
